Caution: color: we ship according to the color of the first picture, in the package: If the quantity is not stated in the description, we will ship the item according to the quantity and model in the title.If the title does not have a quantity, it is 1pcs. High quality 3d pen 3d printing pen,abs and pla filament 1.75Mm. Usb output, low voltage security, with beautiful storage bag only pla filament the product is shipped based on the color or size of the main image of the product page. Colour:only pla filament common faults and solutions. 1.If error code appears on the screen and the red light flashes or nozzle cannot heat up solution: remove the nozzle and press the yellow metal cloth with your fingers and reinstall it. Disconnected and the nozzle needs to be replaced. 3. After the heating is completed, the filament cannot be sucked in, and the motor works normally. Solution: 1. Check whether the filament is worn, 2. Open the back cover and check whether the transparent tube in the middle is blocked. 3. Unload the filament and check whether the nozzle is blocked. 4. The screen is not displayedpossible adaptation failure. Common faults and solutions. 1. Error code appears on the screen and the red light flashes. Solution: remove the nozzle and reinstall it. If the problem cannot be solved, the nozzle circuit may be disconnected and the nozzle needs to be replaced. 2. Nozzle cannot heat up solution: the heating part of the nozzle is damaged and the nozzle needs to be replaced need to confirm that the button is not damaged 3. After the heating is completed, the filament cannot be sucked in, and the motor works normally. Solution: 1. Check whether the filament is worn, 2. Open the back cover and check whether the transparent tube in the middle is blocked. 3. Unload the filament and check whether the nozzle is blocked. 4. The screen is not displayed possible adaptation failure. Please note: 1. Power supply, wires, nozzles, and other consumable accessories of the product. If these products do not work, please contact the seller to replace them. Do not disassemble the product before determining the cause of the failure. If the product is damaged due to disassembly, the seller is not responsible for the warranty. 2. The packing box is not covered by the warranty.